v2.0.1

• Docs: the documented setSourceNamespaces() migration registration does not
  find the bundled migration and never has — yiisoft/db-migration matches the
  PSR-4 map by string prefix and resolves into the core package, so
  ./yii migrate:up exits 0 having created nothing. Both READMEs now say so and
  give a working Injector-based recipe until the upstream fix ships.